Refrigerator tub or bucket.



No. 848,290. PATENTED MAR. 26, 1907.

w J. D. COLLINS.

REFRIGERATOR TUB 0R BUCKET.

APPLICATION FILED 0OT.16 1904.

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REFRIGERATOR TUB OR BUCKET.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed October 15,1904. Serial No. 228,492.

To all whmn it may concern.-

Be it known that I, JESSE D. COLLINS, a citizen of the United States,and a resident of the city of Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements inRefrigerator Tubs and Buckets; and I do hereby de clare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon,

vwhich form a part of this specification.

This invention relates to improvements in refrigerator tubs and buckets,and is shown more particularly in relation with a refrigerator tub orpail adapted for storage of icecream, butter, and many other commoditiessubject to deterioration owing to the change in temperature.

Heretofore many different devices have been used for the purposedescribed, and in many instances have proved unsatisfactory, owing tothe fact that while insulated in parts at other parts the insulation wasimperfect, permitting the effect of the ice and salt or otherrefrigerant used to be in part lost. It is also true in devices of thekind the retaining vessel or receptacle has usually been of arectangular shape, rendering the same much more inconvenient to handleand requiring greater space and more of the refrigerant to pack thesame.

The object of the invention is to provide a refrigerating device adaptedto be insulated at all points and to afford means for economizing therefrigerating medium of whatsoever kind used.

It is also an object of the invention to provide a self-centeringsupport for the can or receptacle adapted to contain the ice-cream orother material to be refrigerated.

The invention consists in the matters hereinafter described, and morefully pointed out and defined in the appended claim.

In the drawings, Figure 1 shows a central vertical section of a deviceembodying my invention. Fig. 2 is a top plan View of the same. Fig. 3 isa top plan view showing the cover entirely removed. Fig. 4 is afragmentary vertical section taken on line 4 4 of Fi 3.

is shown in the drawings, A indicates an outer retaining vessel or tubwhich, as shown, tapers downwardly in the usual manner and is providedwith a bottom a, permanently secured in place and flush with the lowerend of the staves forming the sides of the tub. Seated on the bottom aof said outer tub is the inner tapered tub B, the staves of which belowthe bottom are cut away or shaped to afford a lurality of legs I), whichextend below the bottom I) of the inner tub and support the same at asufficient height above the bottom of the outer'tub to afford anairspace or a space for insulating-packing between said bottoms. The topof said tubs extends to equal height, and an annular cover C isremovably secured thereon by means of stud-screws c, which engage in theouter tub. Said cover projects inwardly flush with the inner side of theinner tub, as shown in Fig. 1, and beneath said cover and the upper endsof the staves of said tubs is provided a gasket c, of any suitablematerial, which. affords a close fit.

An annular cover C comprises, as shown, a lower part e, adapted to fitwithin the inner tub B, and an upper part e of greater diameter, adaptedto rest on the cover C. Said parts are provided with central aperturestherethrough in alinement with the can, and rigidly engaged between saidparts are the outer and inner rings 6 e the latter of which is flushwith the inner circumferences of the parts 6 e, and the other is flushwith the outer circumference of the part c and providing an air-space inthe cover. Said cover is constructed of wood or other suitable materialand is fitted into the opening in the cover C. The central aperturetherein is circular and slightly greater in size than the end of acylindric inner metallic retaining-can D, which contains the substanceto be refrigerated. A closure or cover C which, as shown, is constructedof sheet metal and provided with a partition 0? to afford an innerair-chamber is flanged to extend outwardly on the cover C and fits insaid aperture, closing the same.

The sheet-metal containing-can D is supported above the bottom of theinner tub up on a plurality of raised supports d, secured upon thebottom I) of the inner tub B and each of which is provided at its outerend with a raised portion, forming a shoulder d, which engages outsidethe can D and acts to center the same in place and exposingapproximately the entire bottom of the can, as well as the sides, to theaction of the refrigerant.

The operation is as follows: The tubs being nested one within the otherafford an airspace of uniform size on all sides of the same IIO and alsoan air-space between the bottoms of my invention.

of the tubs, which in itself insures economy in the use of therefrigerant. If preferred, any non-conductor of heat-such as charcoal,sawdust, paper, or other suitable 1naterialmay be used as a filling forsaid air-spaces, though the use of the same is not necessary, inasmuchas perfect insulation can be effected by means of the air-chambers atthe sides and between the bottom of the tubs.

Owing to the fact that the staves of the inner tub are cut away toafford a minimum width on the bottom of the outer tub, it follows thatheat cannot readily be comn1unicated through the bottoms to the innerchamber by means of said staves, and for the purpose of furtherminimizing the effect of physical contact of the reduced stave ends uponthe bottom a sheet of insulating material b is placed in the bottom ofthe outer tub and upon which the inner tub rests.

I/Vhen the ice and salt or other refrigerant is filled into the innertub about the can D, approximately the entire surface of the same,including approximately the entire area of the bottom, is exposeddirectly to the action of the refrigerant, inasmuch as the can issuspended or supported in said refrigerant with. no appreciable physicalcontact or connection with the walls or bottom of the tub, except forthe supports (Z, before described, which, however, are entirelyinsulated from the bottom of the outer tub by the air-space orinsulation between the bottoms of the tubs. As shown, a drainage-pipe Eis connected in the wall of the inner tub at the bottorn by any suitablemeans, such as jam-nuts, to afford a tight joint and is provided with ascrew-cap at its outer end adapted to be removed to permit drainage ofthe inner tub.

Obviously details of construction may be varied without departing fromthe principle I therefore do not purpose limiting this inventionotherwise than necessitated by the prior art.

I claim as my invention- In a device of the class described thecombination with an outer tub of insulating material on the bottomthereof, an inner tub adapted to rest on the insulated bottom of saidouter tub and having a notched lower flange, a can, a plurality ofconcentricallyarranged supports in said inner tub having their uppersurfaces notched to center said can in the tub, an apertured coveradapted for engagement with said outer tub and having its innercircumference flush with the inner tub, insulating material engaged tothe bottom of said cover and closely fitting between the inner and outertubs, a second cover adapted to partly close said inner tub andcomprisinga flanged upper part adapted to rest on the aforesaid cover, alower part adapted to fit closely within the inner tub and a pluralityof circular parts between said upper and lower parts and forming anairspace therein, a central lid or cover concave on its inner surfaceand having a flange integral with the upper edge adapted to rest on thesecond cover, a partition in said lid affording an air-chamber andextending approximately to the middle of the flanged cover of the innertub thereby allowing an air-space between the can. and cover andcompleting the passage around the can and an outlet from the inner tub.

In testimony whereof I have hereunto subscribed my name in the presenceof two subscribing witnesses.

JESSE D. COLLINS.

Witnesses:

C. W. HILLS, H. S. RUDD.

